compiler support added for precise GC

[Andrei Alexandrescu]

On 4/16/12 3:49 PM, Walter Bright wrote:
> Either the compiler has to generate the marking stuff, meaning that no
> user designed GC is very practical, or it has to be generated at compile
> time with a template, where a user designed GC can experiment with a
> much wider range of possibilities without needing compiler modifications.
>
> Also, budding GC implementers will have an existing meta-processing code
> example which will go a long way towards helping get up to speed.
>
> Building a GC is a fairly advanced programming project. I don't think
> it's unreasonable to expect them to be pretty familiar with how D works.

Zat's da spirit!

Andrei